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DarkBASIC Professional Discussion / Wait for Animation to Finish

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Master SeePlusPlus
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Posted: 28th May 2014 17:51
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Hey,

Basically I am currently working on a video game where I have a video playing as the introduction. Unfortunately, when it is playing the program is still running, so the game will start while the video is on the screen.

I have tried doing:

load animation "blahblahblah.avi",1
play animation 1
while spacekey()=0
endwhile

and MANY variations of this using wait keys so other methods, but when I do that the screen stays black and the animation will pop up with the video game on space key. What should I do if I want the program to wait for the animation to finish before continuing?

Thank you!
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Green Gandalf
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Posted: 28th May 2014 18:34
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You need to insert a loop that waits for the animation to finish. Here's one way to do it:





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Master SeePlusPlus
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Posted: 29th May 2014 16:46
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Thank you very much! I find it strange that this works but a while loop was giving me issues. Of course, it may have been I did not have a sync command in. Anyways, thank you very much!

/Solved
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Green Gandalf
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Posted: 29th May 2014 18:31
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Quote: "I find it strange that this works but a while loop was giving me issues. Of course, it may have been I did not have a sync command in."


Works fine for me with or without the syncs or while loops. Perhaps there was something else wrong?

Could you provide a short snippet showing the method you were trying to use? We might as well get to the root of this problem now before it pops up somewhere else in a different context.



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Derek Darkly
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Posted: 29th May 2014 20:36
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Another method could be as simple as knowing the length of your animation and using a timer.

For example, if your animation is 10.2 seconds long:

play animation 1
t#=timer()+10200
while t#>timer()
endwhile

666GO†O666
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MrValentine
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Posted: 29th May 2014 21:33
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TheComet
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Posted: 29th May 2014 21:34
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That wouldn't be consistent over multiple computers, because DBP times animations by framerate, not by real time.

Your dungeon has been arrested by a signature image because it tried to be a mod
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Green Gandalf
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Posted: 30th May 2014 01:41
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Quote: "That wouldn't be consistent over multiple computers, because DBP times animations by framerate, not by real time."


What do you mean?

An animation that is 10 seconds long is 10 seconds long regardless of frame rate.

What is true though is that the screen image is only updated at the frame rate so on slow systems many animation frames will be skipped - but the overall duration remains the same (apart from inaccuracies arising from the skipping). The animation's audio isn't affected as far as I can tell.



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Master SeePlusPlus
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Posted: 30th May 2014 03:32 Edited at: 30th May 2014 03:33
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I was using something to the effect of this:



I figured it would wait to continue until it was done playing. I am still getting used to differences in the way DBPro interprets loops vs raw languages like java or C++

another thing I tried was:



or something like that. Yours worked, however, so thanks
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Chris Tate
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Posted: 30th May 2014 09:49 Edited at: 30th May 2014 09:54
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@Master SeePlusPlus



Never do that! (Scream followed by face palm) The first example you created looks better; however is still going to overload your hardware, but not quite as severely as the first. Prevent overloads by inserting a sync call in the loop like GG did or even better a call to Matrix1 Nice Sleep. That will dedicate more CPU processing for playing the animation smoothly; take a look at your process CPU usage in the task manager.

@Derek Darkly

Your timer example is fine but it requires the animation to continue playing without lag.

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Green Gandalf
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Posted: 30th May 2014 14:58
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Quote: "I was using something to the effect of this:"


Strange. That works fine for me. Anyway, including sync on in your program and then syncing as required is a safer option.

Quote: "another thing I tried was:"


As Chris Tate says, please don't do that. In fact I'm amazed anything like that works - it's asking for a stack overflow and even if it doesn't you'll be left with loads of unterminated gosub references on the stack when the animation eventually ends.



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Derek Darkly
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Posted: 30th May 2014 21:43
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I code on an old Dell Dimension 2300 which runs at a whopping 55-60 FPS in a blank loop.

That said, and as a hobbyist, I don't code with laggy computers in mind. (I test on a Dell E521 at work.) If someone can't play a simple intro animation without lag, how can they expect to enjoy a decent game anyway?

Again though, I'm a hobbyist not a pro developer so my mindset is a little more lax. Just my 2 pesos.

666GO†O666
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Chris Tate
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Posted: 31st May 2014 00:34 Edited at: 31st May 2014 00:35
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Correct, as a hobbyist you are just having fun. I do not code with laggy computers in mind either; that can lead to premature optimization; what I mentioned was more about prevention of running the game before the animation finishes, not knowing what video playback hardware the player has; some can be bad (that is the video playback, not the game playback).

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